Principles and applications of lithium iron phosphate battery
Lithium iron phosphate battery, lithium iron phosphate refers to as a cathode material for lithium ion batteries. Lithium-ion battery cathode material of lithium cobalt oxide, lithium manganese, nickel, lithium, ternary materials, lithium iron phosphate. Wherein the lithium cobalt oxide cathode material is currently used in the vast majority of lithium ion batteries.
LiFePO4 battery can be summarized as the following features.
High efficiency output: standard discharge of 2 ~ 5C, continuous high current discharge up to 10C, instantaneous pulse discharge (10S) of up to 20C;
Good performance at high temperature: the external temperature 65 ℃ when the internal temperature is as high as 95 ℃, the battery is discharged at the end of the temperature up to 160 ℃, the structural safety of the battery, in good condition;
Even if the internal battery or external injury, the battery is not burning, no explosion, the best security;
Excellent cycle life, after 500 cycles, the discharge capacity is still greater than 95%;
Over-discharge to zero volts and no damage;
No memory effect: the battery can be charged in full after letting go of the conditions often in work, the capacity will be lower than the nominal capacity value rapidly, a phenomenon called memory effect. Nickel-metal hydride and nickel cadmium batteries exist memory, lithium iron phosphate is no such phenomenon, no matter what state the battery can recharge it with no need to recharge is done.
Small size, light weight, small size equivalent capacity of lithium iron phosphate is the volume of lead-acid batteries 1/3, 1/3 weight of lead-acid batteries.
Environmental pollution, the battery does not contain any heavy metals and rare metals (nickel-metal hydride batteries to be rare), non-toxic (SGS certification through), non-polluting, in line with European ROHS requirements, an absolute green batteries. Lead-acid batteries, but there are a lot of lead in the waste, if handled properly, will the formation of secondary pollution to the environment, and lithium iron phosphate material in terms of production and use, are pollution-free. .
Because iron phosphate lithium battery having the above characteristics, and produce a variety of different capacity battery soon be widely applied. Its main application areas are:
Large electric vehicles: buses, electric vehicles, hybrid vehicles and other attractions and tour buses;
LEV: electric bicycles, golf carts, small flat car battery, forklift, cleaning vehicles, electric wheelchairs;
Power Tools: drills, saws, mowers and so on;
Remote control cars, boats, airplanes and other toys;
Solar and wind power energy storage device;
UPS and emergency lights, warning lights and miner (the best security);
Alternative disposable camera 3V lithium battery and 9V nickel-cadmium or nickel metal hydride rechargeable batteries (the same size);
Small medical equipment and portable instruments.